Video: Riding This Slide Will Freeze Your Pretty Bum Bum

If you are near National Harbour in Fort Washington, Maryland, don't miss their 4500sqm Gaylord National's ICE! exhibit, a winter wonderland made with 900,000kg of ice. And let your pretty butt freeze, swooshing down their 6m slide.

Wheeeeee! Kind of underwhelming, I know, but it looks pretty. [Big Picture]

Using ground-penetrating radar, scientists detected a massive reservoir of frozen water sandwiched by layers of sand beneath the northern polar ice cap on Mars. This reservoir contains so much ice that, if melted and brought to the surface, it would submerge the entire planet.